Tub cooler



FIG. 1 is a perspective view of a tub cooler;

FIG. 2 is a front view of the tub cooler;

FIG. 3 is a rear view of the tub cooler;

FIG. 4 is a top view of the tub cooler;

FIG. 5 is a bottom view of the tub cooler;

FIG. 6 is a right side view of the tub cooler; and,

FIG. 7 is a left side view of the tub cooler.

The broken lines illustrate environment and form no part of the claimed design. 

CLAIM The ornamental design for a tub cooler, as shown and described. 